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touch-tone

or touch·tone

[tuhch-tohn]
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adjective
  1. of or relating to a tone-dialing system or a push-button phone operating on tone dialing.
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noun
  1. (sometimes initial capital letter) a tone-dialing system.
  2. a telephone utilizing this system.
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Origin of touch-tone

An Americanism dating back to 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for touch-tone

touch-tone

adjective
  1. of or relating to a telephone dialling system in which each of the buttons pressed generates a tone of a different pitch, which is transmitted to the exchange
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012